BAQOUBA, Iraq (AP) -- Gunmen pulled factory workers off buses northeast of Baghdad and killed 47 of them, a provincial council member said.

The victims were traveling in three buses when they were stopped at a checkpoint in the Nahrawan area, about 12 miles south of Baqouba, said Dhari Thuban, a member of the Diyala Provincial Council. The buses were burned and their passengers killed, he said.

The motive for the killing was not immediately clear.

Residents told police that the bullet-riddled bodies were found around midday behind a brick factory, the Interior Ministry said.

The victims, who ranged in age between about 20 and 50, were dressed in civilian clothes and their deaths appeared recent, the ministry's Maj. Falah al-Mohamadawi told the Associated Press.

Thuban said the victims were brick factory workers, but al-Mohamadawi said no identification documents were found on them.